<html>
	<head>
		<script type="text/javascript">
			// Dojo configuration
			djConfig = { isDebug: true };
		</script>
		<script type="text/javascript" src="../../dojo.js"></script>
		<script type="text/javascript">
			dojo.require("dojo.event.topic");

			function Subscriber(displayNode){
                this.displayNode = displayNode;

                this.update = function(message) {
                    this.displayNode.innerHTML = message;
                };
			}

			var clickCount = 0;
	
			function sendMessage1() {
					topic1.sendMessage("Message " + ++clickCount);
			}
	
			function sendMessage2() {
					topic2.sendMessage("Message " + ++clickCount);
			}

			var subCounter = 0;
			function addSubscriber(subName){
				var container = dojo.byId("container");
				var newSub = document.createElement("div");
				newSub.id = "subscriber"+subCounter++;
				newSub.innerHTML = newSub.id;
				container.appendChild(newSub);
				return new Subscriber(newSub);
			}

			dojo.addOnLoad(function(){
				topic1 = dojo.event.topic.getTopic("testTopic1");
				topic2 = dojo.event.topic.getTopic("testTopic2");

				var sub1 = addSubscriber();
				var sub2 = addSubscriber();

                topic1.subscribe(sub1, "update");
                topic1.subscribe(sub2, "update");

                topic2.subscribe(sub2, "update");
			});
		</script>
	</head>
	<body>
		Check your javascript log; the scripts were all loaded in the head.

		<div id="container">
		</div>

		<button id="publisher" onclick="sendMessage1();">
			Publish a message on Topic1
		</button>

		<button id="publisher2" onclick="sendMessage2();">
			Publish a message on Topic2 
		</button>

		<button onclick="dojo.event.topic.subscribe('testTopic1', addSubscriber(), 'update');"> Add a new subscriber </button>

    </body>
</html>
